A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design strategies for residential ventilation systems
In the literature on ventilation, residential ventilation systems have traditionally received less attention due to their relatively low capacity and complexity. Nevertheless, the large energy saving potential of the residential building sector has made it one of the key targets of climate change mitigation strategies in the European Union. With the rather successful penetration of insulation measures and weatherization, ventilation heat loss now dominates the total heating demand in newly built dwellings, opening a renewed debate on ventilation rates and sizing. Meanwhile, demand control and heat recovery technologies claim to provide substantially better performance than traditional systems. Both have acquired an important but highly competitive share in the market. This dissertation addresses the performance trade-off between heat loss and indoor air quality inherent to ventilation and focusses on the effectiveness of design strategies, demand control and heat recovery for residential systems with respect to this trade-off. After sketching a context and defining a set of design objectives for residential ventilation in the first chapter, it explores the performance level achieved by the ‘state of the art’, represented by the design strategies included in a series of contemporary residential ventilation standards in the second chapter. The performance of systems sized in accordance with the different standards proves to be substantially different, with an occurrence of poor perceived air quality in 5% or less of the occupation time for the Belgian, Dutch and French standard, and about 15% for the British and ASHRAE standard. Mechanical supply and exhaust ventilation is shown to be more robust than natural or mechanical exhaust ventilation across all standards and a clear interaction between the performance of mechanical exhaust ventilation and envelope leakage is found. Considering average exposure to carbon dioxide, optimized mechanical supply and exhaust ventilation concept performs only slightly better ...
Design strategies for residential ventilation systems
In the literature on ventilation, residential ventilation systems have traditionally received less attention due to their relatively low capacity and complexity. Nevertheless, the large energy saving potential of the residential building sector has made it one of the key targets of climate change mitigation strategies in the European Union. With the rather successful penetration of insulation measures and weatherization, ventilation heat loss now dominates the total heating demand in newly built dwellings, opening a renewed debate on ventilation rates and sizing. Meanwhile, demand control and heat recovery technologies claim to provide substantially better performance than traditional systems. Both have acquired an important but highly competitive share in the market. This dissertation addresses the performance trade-off between heat loss and indoor air quality inherent to ventilation and focusses on the effectiveness of design strategies, demand control and heat recovery for residential systems with respect to this trade-off. After sketching a context and defining a set of design objectives for residential ventilation in the first chapter, it explores the performance level achieved by the ‘state of the art’, represented by the design strategies included in a series of contemporary residential ventilation standards in the second chapter. The performance of systems sized in accordance with the different standards proves to be substantially different, with an occurrence of poor perceived air quality in 5% or less of the occupation time for the Belgian, Dutch and French standard, and about 15% for the British and ASHRAE standard. Mechanical supply and exhaust ventilation is shown to be more robust than natural or mechanical exhaust ventilation across all standards and a clear interaction between the performance of mechanical exhaust ventilation and envelope leakage is found. Considering average exposure to carbon dioxide, optimized mechanical supply and exhaust ventilation concept performs only slightly better ...
Design strategies for residential ventilation systems
Laverge, Jelle (author) / Janssens, Arnold
2013-01-01
Theses
Electronic Resource
English
DDC:
690
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